Yanmar

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1

Posted by wacormack (wacormack@…>)

A peculiar problem has surfaced with my 3gm30f and the batteries on my F36.
I have two banks. House is two 100AH gel cells and starting is one 70AH
flooded maintenance free. I have been using the house bank for starting as
well as house use and keeping the starting battery in reserve. Recently I
have been unable to start with the house bank.

To see what was going on I used a digital multi-meter connected to the panel
ground and to the amp-meter post on the panel. The house bank showed 12.33V
and stating showed 12.5. Using long wires to be able to read the meter from
the cockpit I got the following results when trying to start:

  1. From the starting battery when I turned on the key the warning buzzer
    sounded and when the starter button was pushed the engine cranked. Voltage
    dropped maybe .1 volt upon turning on the key and dropped to 11.8 during
    cranking.

  2. From the house bank there was no voltage drop (when key was turned on or
    when start button pressed), no warning buzzer and no cranking.

All the house loads work fine from either bank - VHF, autopilot, gps, lights
and do register slight voltage drops when turned on.

I replaced the battery selector switch with no change in the above results.
Since the house bank was a little low I then took a motor cruise for an hour
and a half until the house bank’s voltage had risen to 14.4 as recommended
by the battery manufacturer. Still no change in the above results.

Anyone have an suggestions?

Bill
William A. Cormack, CPA
Principal and Chief Financial Officer
Whelan Associates, LLC, a Corporate Real Estate Service firm
500 Faunce Conrer Road, Building 100
North Dartmouth, MA 02747
Voice: 508-984-4100, Fax: 508-984-4101, Cell 508-254-5828
MailTo:wacormack@…

2

Posted by macks011 (macks04@…>)

First off, you should try to take battery readings from the battery
posts themselves and then only after they’re in a rest state. The
simplest and easiest course of action is to inspect, clean and
tighten every connection in the starting circut. If that produces no
results, You may need to install a solenoid in the starting circut.

As the boat ages, resistance builds up in the starting circut.
Yanmars are wired so that all the starting current runs through the
starting switches and back to the starter motor, a considerable
distance. A solenoid reduces the distance the current has to travel
and you can install larger wires to carry it.

I have installed a Cole Hersee solenoid #24117-01 on my boat and it
works perfectly. Torrence marine suggested the cure and Mack Boring
blessed it. In fact, this is how they rig the starting circuts on
power boats with longer wiring harnesses.

I have the wiring diagrams on my hard drive and can e-mail them to
you if you are interested.





— In freedomyachts2003@yahoogroups.com, “wacormack”
<wacormack@w…> wrote:

A peculiar problem has surfaced with my 3gm30f and the batteries
on my F36.
I have two banks. House is two 100AH gel cells and starting is
one 70AH
flooded maintenance free. I have been using the house bank for
starting as
well as house use and keeping the starting battery in reserve.
Recently I
have been unable to start with the house bank.

To see what was going on I used a digital multi-meter connected to
the panel
ground and to the amp-meter post on the panel. The house bank
showed 12.33V
and stating showed 12.5. Using long wires to be able to read the
meter from
the cockpit I got the following results when trying to start:

  1. From the starting battery when I turned on the key the warning
    buzzer
    sounded and when the starter button was pushed the engine cranked.
    Voltage
    dropped maybe .1 volt upon turning on the key and dropped to 11.8
    during
    cranking.

  2. From the house bank there was no voltage drop (when key was
    turned on or
    when start button pressed), no warning buzzer and no cranking.

All the house loads work fine from either bank - VHF, autopilot,
gps, lights
and do register slight voltage drops when turned on.

I replaced the battery selector switch with no change in the above
results.
Since the house bank was a little low I then took a motor cruise
for an hour
and a half until the house bank’s voltage had risen to 14.4 as
recommended
by the battery manufacturer. Still no change in the above results.

Anyone have an suggestions?

Bill
William A. Cormack, CPA
Principal and Chief Financial Officer
Whelan Associates, LLC, a Corporate Real Estate Service firm
500 Faunce Conrer Road, Building 100
North Dartmouth, MA 02747
Voice: 508-984-4100, Fax: 508-984-4101, Cell 508-254-5828
MailTo:wacormack@w…

3

Posted by Brian Guptil (sailordude@…>)


Since the house
battery voltage does not change when the starting is attempted, it is a wiring
problem. It sounds like the power to the Yenmar panel is interrupted when
the battery switch is set to House.

Brian
Guptil sailordude@…
2501 Boston St.
Slip-36 www.brigup.com
Baltimore, MD
21224 206-818-3203
S/V Cayenne is
moored on C dock.

-----Original Message-----
From: freedomyachts2003@yahoogroups.com [mailto:freedomyachts2003@yahoogroups.com] On Behalf Of wacormack
Sent: Tuesday, August 09, 2005 7:01 AM
To: freedomyachts2003@yahoogroups.com
Subject: [freedomyachts2003]
Yanmar

A peculiar problem has surfaced with my 3gm30f and the
batteries on my F36.
I have two banks. House is two 100AH gel
cells and starting is one 70AH
flooded maintenance free. I have been using
the house bank for starting as
well as house use and keeping the starting battery
in reserve. Recently I
have been unable to start with the house bank.

To see what was going on I used a digital
multi-meter connected to the panel
ground and to the amp-meter post on the
panel. The house bank showed 12.33V
and stating showed 12.5. Using long wires to
be able to read the meter from
the cockpit I got the following results when
trying to start:

  1. From the starting battery when I turned
    on the key the warning buzzer
    sounded and when the starter button was pushed the
    engine cranked. Voltage
    dropped maybe .1 volt upon turning on the key and
    dropped to 11.8 during
    cranking.

  2. From the house bank there was no voltage
    drop (when key was turned on or
    when start button pressed), no warning buzzer and
    no cranking.

All the house loads work fine from either bank -
VHF, autopilot, gps, lights
and do register slight voltage drops when turned
on.

I replaced the battery selector switch with no
change in the above results.
Since the house bank was a little low I then took
a motor cruise for an hour
and a half until the house bank’s voltage had
risen to 14.4 as recommended
by the battery manufacturer. Still no change
in the above results.

Anyone have an suggestions?

Bill
William A. Cormack, CPA
Principal and Chief Financial Officer
Whelan Associates, LLC, a Corporate Real Estate
Service firm
500 Faunce Conrer Road, Building 100
North Dartmouth, MA 02747
Voice: 508-984-4100, Fax: 508-984-4101, Cell
508-254-5828
MailTo:wacormack@…

\

4

Posted by gjschouten (schouten@…>)

Remember that in order to avoid damage gel cells and flooded batteries
must be charged and floated at different voltages!
Hence normally these two different type of batteries should not be
charged with the same generator and or battery charger.
If damage already occured you may be able to resurrect the battery
with a battery “cracker”. This is an electronic device that sits on the
two poles of the battery and sends high current ( 1000A) but very low
votage (<1mV) pulses thru the battery. This process brakes down the
sulphate on the battery plates. It may take sevceral month before
complete restore.


— In freedomyachts2003@yahoogroups.com, “wacormack” <wacormack@w…>
wrote:

A peculiar problem has surfaced with my 3gm30f and the batteries on
my F36.
I have two banks. House is two 100AH gel cells and starting is one
70AH
flooded maintenance free. I have been using the house bank for
starting as
well as house use and keeping the starting battery in reserve.
Recently I
have been unable to start with the house bank.

To see what was going on I used a digital multi-meter connected to
the panel
ground and to the amp-meter post on the panel. The house bank
showed 12.33V
and stating showed 12.5. Using long wires to be able to read the
meter from
the cockpit I got the following results when trying to start:

  1. From the starting battery when I turned on the key the warning
    buzzer
    sounded and when the starter button was pushed the engine cranked.
    Voltage
    dropped maybe .1 volt upon turning on the key and dropped to 11.8
    during
    cranking.

  2. From the house bank there was no voltage drop (when key was
    turned on or
    when start button pressed), no warning buzzer and no cranking.

All the house loads work fine from either bank - VHF, autopilot,
gps, lights
and do register slight voltage drops when turned on.

I replaced the battery selector switch with no change in the above
results.
Since the house bank was a little low I then took a motor cruise for
an hour
and a half until the house bank’s voltage had risen to 14.4 as
recommended
by the battery manufacturer. Still no change in the above results.

Anyone have an suggestions?

Bill
William A. Cormack, CPA
Principal and Chief Financial Officer
Whelan Associates, LLC, a Corporate Real Estate Service firm
500 Faunce Conrer Road, Building 100
North Dartmouth, MA 02747
Voice: 508-984-4100, Fax: 508-984-4101, Cell 508-254-5828
MailTo:wacormack@w…